miller



No. 623,680. Patented Apr. 25, |899.

D. H. MILLER. vELoclPEnE GEAR.

(Apphcat on led D c 15 1897) 2 Sheets-Sheet l.

(No Model.)

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Patented mpi. 25, |899.

D. H. MILLER.

VELUCIPEDE GEAR.

(Application led Dec. 15, 1897.!

2 Sheets-Sheet 2.

(No Windel.)

/A/l/f/vrof? 47T roRA/Eys TH: Ncnms PETERS co.. Fumo-Lima. wAsHINnTcN.c:4 c,

DAVID II. MILLER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE AMERICANCI'IAINLESS WHEEL COMPANY, OF SAME PLACE.

VELOClPEDE-G EAR.

SPECIFICATION forming part of Letters Patent N 0. 623,680, dated April25, 1899.

Application tiled December 15,1897. Serial No. 661,967. (No model.)

To au whom. it may concern:

Be it known that I, DAVID II. MILLER, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inVelocipede-Gears, of which the following is a specification.

My invention relates to certain improvements in gears for velocipedes inwhich it is desirable to mount the cranks upon or adjacent to thejournals of the drive-wheel and at the same time gear up from the crankshaft or shafts to the drive-wheel to give the latter greater speed thanthe former.

The invention consists in certain devices relating to the mounting andgearing of the drive-wheel and cranks, which will be described in theirpreferred form and arrangement and the essential features of which willbe pointed out in the claim.

The drawings contain ten figures, ot which Figure lis a side elevationof one of the many forms of velocipedes to which my invention may beapplied. Fig. 2 is a vertical transverse section in line 2 2 of Fig. l.Fig. 3 is an enlarged side elevation of one of the crankhangers. Fig. 4is a horizontal section in line 4 4 of Fig. l. Fig. 5 is a section inline 5 5 of Fig. 6 and shows the drive-wheel hub, axle, and journals.Fig. 6 is a side elevation of the same. Fig. 7 is a view similar to Fig.3, showing the opposite side ot' the hanger shown in the former igure.Fig. S is a vertical section in line S S of Fig. A2. Fig. 9 is a detailside elevation showing the connection of a portion of the frame with thecrankhangers, and Fig. 10 is an end elevation of the same. y

Referring to the drawings, A A' are two hanger-plates rigidly supportedby the frame of the machine and each containing a preferably centralopening a and a slot a', the opening being shown as screw-threaded andthe walls of the slot as containing a V-shaped groove. A bearing collarB is externally threaded to it the opening a and is secured in saidopening and held therein against rotation by a jam-nut l). An internalgear C is secured upon the crank-shaftD, (here shown as threadedthereto,) and is locked by means of a jam-nut d. A covering E, having acentral perforation adapted to receive the crankshaft, is placed uponsaid crank-shaft before the internal gear is secured thereon. Thecrank-shaft is then inserted in the bearingcollar B. Said bearing-collarhas formed in it bearing-cups b b'. rIhe. nut d has a cone dcorresponding to one of the cups. A nut d2, threaded upon the inner endof the crankshaft, has a cone corresponding to the other of the cu ps,and said nut d2 is locked in proper adjustment by means of a jam-nut d3.

In the slot a, having the grooved walls, is placed a slide F, which isshown in side elevation in Fig. 6 and in its proper place in thehanger-plate in Fig. 3. The edges of the slide are fitted to the groovedwalls of the slot, and upon the inner surface of said slide is a lug f,extending laterally beyond the slot and secured to a pair of lugs a2 a3(see Fig.

v7) upon the inner side of the hanger-plate by :means of the screws G G.(Shown in Fig. 3 in dotted lines.) The upper end of each of the slides Fhas an inwardly-extending boss f', shown by the two intersectingsections seen in Figs. 2 and 5, and in this boss is formed a bearingcontaining two ball cups or races f2. The axle 7L of the drive-wheel I-Ibears a cone h, corresponding to one of the cups f2, and said axleextends through the boss f and has threaded upon it a pinion h2 in meshwith the internal gear C and bearing a cone corresponding to the otherof the two cups f2. Suitable balls are provided in the bearing,and thepinion h2 is secured against rotation on the axle 7L by means of ajam-nut h3. The boss f also serves as a pivot to hold the rear extremityof two braces O P, extending back from the front portion of the frame,said braces terminating in av common block o, having a removable endpiece or yoke 0.

The frame shown in the drawings is so constructed that certain membersof the same have a limited oscillating movement with respect to theother members, this being accomplished by pivoting certain members ofthe framework together, as is clearly illustrated in Fig. 1, andspecifically described in my pending application for United Statespatent for improvements in bicycle-frames iiled December 15,1897, andgiven Serial No. 661,966.

The specific form and arrangement of the IOO various devices are notessential to the invention, broadly considered, inasmuch as more or lessvariation is possible without departing materially from said invention.

I claim as new and desire to secure by Leta cover secured to thehanger-plate and inclosing both of said gears, suitable ball-races inthe bearing-collar, a cone threaded upon the shaft and holding theinternal gear in place thereon, a second cone adjustably clamped uponthe opposite end of the shaft and suitable balls adapted to said racesand said cones; substantially as described.

In witness whereof I have hereunto set my hand, at Chicago, in thecounty of Cook and State of Illinois, this 7th day of December, A. D.1897.

DAVID II. MILLER.

lVitnesses:

S. F. KLoHs, Il. BITNER.

